Which one of the following ions has electronic configuration[Ar] 3d⁶? (At. no: Mn=25, Fe=26, Co=27, Ni=28)
Options
(a) Ni³⁺ (b) Mn³⁺ (c) Fe³⁺ (d) Co³⁺
Correct Answer:
Co³⁺
Explanation:
Ni³⁺ (28) = [Ar] […]
The pair of species that has the same bond order in the following is:
Options
(a) O₂, B₂ (b) CO, NO⁺ (c) NO⁻, CN⁻ (d) O₂, N₂
Correct Answer:
CO, NO⁺
Explanation:
No. […]
Which of the following is isoelectronic?
Options
(a) CO2, NO₂ (b) NO₂⁻, CO₂ (c) CN⁻, CO (d) SO₂, CO₂
Correct Answer:
CN⁻, CO
Explanation:
Both CN⁻, CO has 14 electrons
The ion that is isoelectronic with CO is
Options
(a) CN⁻ (b) O₂⁺ (c) O₂⁻ (d) N₂⁺
Correct Answer:
CN⁻
Explanation:
We know that ions which have the same number of electrons are […]
The species having maximum stability is
Options
(a) CN⁺ (b) CN (c) CN⁻ (d) NO
Correct Answer:
CN⁻
Explanation:
In CN⁺, CN, CN⁻ and NO bond orders are 2, 2.5, 3 and 2.5 […]
The correct order of increasing bond angles in the following species is
Options
(a) Cl₂O < ClO₂ < ClO₂⁻ (b) ClO₂ < Cl₂O < ClO₂⁻ (c) Cl₂O < ClO₂⁻ < ClO₂ (d) ClO₂⁻ […]
Which one of the following oxides is expected to exhibit paramagnetic behaviour?
Options
(a) CO₂ (b) SiO₂ (c) SO₂ (d) ClO₂
Correct Answer:
ClO₂
Explanation:
It is because of odd number of electrons […]
Which of the following species has four lone pairs of electrons?
Options
(a) I (b) O⁻ (c) Cl⁻ (d) He
Correct Answer:
Cl⁻
Explanation:
No explanation available. Be the first to write the […]
Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is :
Options
(a) Ca < Mg < P< Cl (b) Mg < Ca < Cl < P (c) […]
Which one of the following elements has the maximum electron affinity?
Options
(a) F (b) Cl (c) Br (d) I
Correct Answer:
Cl
Explanation:
Chlorine hasmaximum electron affinity. Fluorine although have highest electronegativity […]
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